import { html, TemplateResult } from 'lit';
export { html };
/**
 * Renders a lit template into a container and returns the first element child.
 * Replacement for @open-wc/testing fixture function.
 */
export declare function fixture<T extends Element>(template: TemplateResult): Promise<T>;
/**
 * Wait for a specified number of milliseconds.
 * Replacement for @open-wc/testing aTimeout function.
 */
export declare function aTimeout(ms: number): Promise<void>;
/**
 * Wait until a condition becomes true or timeout.
 * Replacement for @open-wc/testing waitUntil function.
 */
export declare function waitUntil(condition: () => boolean | Promise<boolean>, message?: string, options?: {
    interval?: number;
    timeout?: number;
}): Promise<void>;
/** A testing utility that clicks on an element. */
export declare function clickOnElement(
/** The element to click */
el: Element, 
/** The location of the element to click (ignored for now, clicks center) */
_position?: 'top' | 'right' | 'bottom' | 'left' | 'center', 
/** The horizontal offset to apply to the position when clicking (ignored) */
_offsetX?: number, 
/** The vertical offset to apply to the position when clicking (ignored) */
_offsetY?: number): Promise<void>;
/** A testing utility that moves the mouse onto an element. */
export declare function moveMouseOnElement(
/** The element to hover */
el: Element, 
/** The location of the element (ignored for now, hovers center) */
_position?: 'top' | 'right' | 'bottom' | 'left' | 'center', 
/** The horizontal offset to apply (ignored) */
_offsetX?: number, 
/** The vertical offset to apply (ignored) */
_offsetY?: number): Promise<void>;
/** A testing utility that drags an element with the mouse. */
export declare function dragElement(
/** The element to drag */
source: Element, 
/** The horizontal distance to drag in pixels */
deltaX?: number, 
/** The vertical distance to drag in pixels */
deltaY?: number): Promise<void>;
export declare function isWebKit(): boolean;
/**
 * WebKit-aware Tab helper.
 * On WebKit, use Alt+Tab to move focus
 */
export declare function tabNext(options?: {
    shift?: boolean;
}): Promise<void>;
export declare function isChromium(): boolean;
export declare function isFirefox(): boolean;
export declare function onlyDate(date: Date | undefined): string | undefined;
/** A helper to wait for a specific amount of time */
export declare function timeout(ms: number): Promise<void>;
/** A helper to wait for a condition to become true */
export declare function conditionToBeTrue(condition: () => boolean, timeoutMs?: number): Promise<void>;
export declare function setViewportSize(width: number, height: number): Promise<() => Promise<void>>;